Furnace.



No. 870,322. PATENTED NOV. 5, 1907.

H. STRAND.

- FURNACE.

APPLIOATION FILED MAY 9, 1907.

. v I L m Quanta UNITED STATES PATENT OFFICE. 1

HENRY STRAND, OF CLEVELAND, OHIO, ASSIGNOR TO STRAND HEATER COMPANY, OF

CLEVELAND, OHIO, A 'GORPORATION OF OHIO.

renames To all whom it may concern: V

Be it known that I, HENRY STRAND, a citizen of the United States, residing at Cleveland, in the county of Ouyahoga and .State of Ohio, have invented certain 5 new and useful Improvements in Furnacesof which the following is a specification.

This invention ,relates to gas heating furnaces,- and is particularly an improvement on the furnace shown and described in my U. S. Patent N 0. 845,828, dated March The object of the present invention is to improve the construction of theiun'iace with respect to the casting which forms the head of some of the drums, the intent being to prevent any possible leak of gas or product of combustion, from the fiue or passage throug'hwhich said products pass, into the passages through which the air is supplied to the apartment or room in the floor-oi which the iurnaceis placed l A further object of the invention is to improve the construction of the furnace with respect to the, chamber in which the furnace is located, to prevent any downward or back flow of the products of combustion to the cellar or space below the floor. I

The invention is illustrated in drawings, in which I Figure l is a top plan view with the register plate removed. ,Fig. 2 is a section on the line 2-2 of Fig. l.

the accompanying vSpecification of Letters Patent. Application filed May 9. I907. Serial No. 872,742, I

'venient for proper regulation of .said rods.

Fig. 3 is a detail in section on the line 3-3 of Figs. 1 and 2.

The general construction'oi the present furnace, with respect to the passages for the products of combustion in the heateda'ir, is not substantially different from that shownin my former patent, and therefore needs no extended description, further. than to say that the prodnets of combustion pass from the burner 11 up through the drum 13 and out between pipes 23 to the space 20 between the drums 17 and 18, down'which space said products pass to the outlet pipe 22 which leads through the jackets 6 and 6 to the smoke flue. l

The pipes 23 are segmental in horizontal cross section, asillustrated in the top view, Fig. 1, and they are cast integral with the plates 14 and -15, being cored in beloose and allow the products of combustion to pass into said pipes 23 and thus into "the space above the same which communicates with the rboms to be heated, through the register 7. The plate 14 has depending ring flanges 14 and l i within which the drums 13 and 17 are fixed with joints closed by asbestos putty as indicated at D. The upper plate 15 also has 2. depending ring flange 15 to which the drum 18 is joined, with putty, as indicated.

tween said plates so that there is no joint apt to become The advantage of having a perfectly tight and unbreakable joint between the plates 14 and lfiflfind the l Patented Nov. 5, 190 7,

pipes 23,;is that the heat or hottest part of the products of combustion collect. and remain in between said plates, and hence the expansion is quite apt to' open a made joint, whereas by having all said parts formed in one piece danger of leak is avoided, and consequently the gas and products oi conf bustion cannot escape into the air passage. The top plate 15 may have an opening at the center to receive a mica window 15 held in place by a clamp 15. The fire below can be seen from above throi' h, this window, and its condition observed. This is c the flame. I The drums 13, 17 and 18 are fixed at the bottom tox ring plate 49 provided with-flanges 49 to which "re drums 17 and 18 are puttied, and said ring plate .o-sts around the neck of the fire pot 12, with a puttied joint at 12", This fire pot is contracted above the burner and is supported by and made integral with a plate 8 which isconnected by long rods 8* to the top plate of the fur nace, all ol the parts being thus clamped togetll r by The fire pot also has an inwardly-extending portion B which projects under the burner 11 and forms a contracted mouth thereunder, to which tapers an in-. verted funnel orfrusto-conical part C, giving a tapering passage through which air is admitted from the out side to the'burner. The advantage 0! this construction is that the contracted or tapering inlet to the Tire pot, directly under the burner, prevents any back flow of the products of combustion, through the bottom of the furnace, and consequently prevents the escape of said of, a fire pot surrounding the same, the tire pot being of less diameter than the burner at the top and expanded outwardly and downwardly to form an enlarged chamber 7 around the burner, and having a lower inwardly extended 10C portion which projects under the burner and formsa contracted opening at the c nter of less diameter than said burner. I

In testimony whereof I do afiix my signature. in'presence of two witnesses. 4

v HENRY STRAND. Witnesses: I

Jon): A. BOMMHARDI', Eor'rn 11 Conan. 

